1/*
2 * Copyright (c) 2011 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "krb5_locl.h"
35
36
37krb5_error_code
38_krb5_fast_cf2(krb5_context context,
39	       krb5_keyblock *key1,
40	       const char *pepper1,
41	       krb5_keyblock *key2,
42	       const char *pepper2,
43	       krb5_keyblock *armorkey,
44	       krb5_crypto *armor_crypto)
45{
46    krb5_crypto crypto1, crypto2;
47    krb5_data pa1, pa2;
48    krb5_error_code ret;
49
50    ret = krb5_crypto_init(context, key1, 0, &crypto1);
51    if (ret)
52	return ret;
53
54    ret = krb5_crypto_init(context, key2, 0, &crypto2);
55    if (ret) {
56	krb5_crypto_destroy(context, crypto1);
57	return ret;
58    }
59
60    pa1.data = rk_UNCONST(pepper1);
61    pa1.length = strlen(pepper1);
62    pa2.data = rk_UNCONST(pepper2);
63    pa2.length = strlen(pepper2);
64
65    ret = krb5_crypto_fx_cf2(context, crypto1, crypto2, &pa1, &pa2,
66			     key1->keytype, armorkey);
67    krb5_crypto_destroy(context, crypto1);
68    krb5_crypto_destroy(context, crypto2);
69    if (ret)
70	return ret;
71
72    if (armor_crypto) {
73	ret = krb5_crypto_init(context, armorkey, 0, armor_crypto);
74	if (ret)
75	    krb5_free_keyblock_contents(context, armorkey);
76    }
77
78    return ret;
79}
80
81krb5_error_code
82_krb5_fast_armor_key(krb5_context context,
83		     krb5_keyblock *subkey,
84		     krb5_keyblock *sessionkey,
85		     krb5_keyblock *armorkey,
86		     krb5_crypto *armor_crypto)
87{
88    return _krb5_fast_cf2(context,
89			  subkey,
90			  "subkeyarmor",
91			  sessionkey,
92			  "ticketarmor",
93			  armorkey,
94			  armor_crypto);
95}
96